Hone for sharpening clippers



Feb. '2 .1926. 1,571,555

J. P. NIESEN HONE FOR SHARPENING CLIPPERS Filed August 27, 1924 Jacob P M85822- Patented Feb. 2, 1926.

UNITED STATES JACOB 1?. NIESEN, OF CHICAGO, ILLINOIS.

HONE FOR SHARPENING CLIPPERS.

Application filed August 27, 1924. Serial No. 734,375.

To all whom it may concern:

Be it known that I, JACOB P. NncsEN, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Hones for Sharpening Clippers; and I hereby declare that the following is a full, clear, and exact description of the same, reference being'had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to sharpening means for clippers and especially for power driven clippers.

It is an object of this invention to provide a sharpening hone for clippers adapted to be operated by the clipper mechanism and includes means whereby the hone may be readily inserted between the cutting knives. With the recently developed electric hair clippers for example, the knives are subject to almost as much wear in a single hair cut as the former hand clippers received in a month or more, as the electrically driven cutters run at a high speed and are so convenient that they are used much more extensively than the hand clippers were. It follows that frequent sharpening is required, and hand honing not only requires real skill on the part of the operator to obtain parallel surfaces on the knives, but is a laborious process that is apt to be postponed unduly by a busy barber.

' It is also'an object of this invention to provide means for maintaining plane surfaces on the knives of a clipper while sharpening the same by subjecting mating surfaces of each blade to a uniform abrasive action on a plane surface. With a hand hone the two alignment surfaces of the stationary blade of such a clipper cannot be sharpened at the same time due to upstanding lugs engaging the moving blade.

It is a further object of this invention to provide an abrasive member adapted to be inserted between the cutting blades of a clipper in such a way as to utilize the spring clamping of the clipper blades to secure an adjustable degree of uniform tension on the blades during the sharpening process.

Other and further important objects of this invention will be apparent from the disclosures inthe specification .and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is an enlarged view of a device embodying the features of this invention.

Figure 2 is a top view thereof.

F igure 3 is a side view of a hair clipper having the device of this invention inserted in position to sharpen the moving blade;

Figure 4 is a top view corresponding to Figure 3.

Figure 5 is a view corresponding to Figure 4rwith the blade clamp removed.

Figure 6 is a view similar to Figure 5 with the device of this invention reversed to sharpen the stationary knife of the clipper.

Figure 7 is a section on the line 77 of Figure 2.

vAs shown on the drawings:

The particular clipper mechanism chosen for illustration comprises a handle 10 having a stationary lower serrated knife 11 secured thereto with two upstanding lugs 12 for guiding the reciprocating upper knife 13 which is rapidly recipro cated by an oscillating lever 14 which is driven by suitable mechanism in the handle. The upper knife is under adjustable compression by means .of a clamp 15 held down by a threaded knob 16 and spring washer 17 engaged about the post 18. By removing the knob and clamp the upper knife 13 can be removed at any time.

The device of this invention comprises a metal holder 19 in the form of a shallow tray having reinforcing indentations 19 in the bottom thereof, the shallow flanges 20 of which serve to retain the plastic abrasive compound 21 until the latter hardens into a plane surface. The lower end of the tray in Figure 2 is provided with elongated slots 22 to fit over the lugs 12 on the lower knife with suflicient clearance to allow reciprocation of the abrasive carrying tray over the lower knife, a narrow recess 23 being provided in the edge of the tray to engage the oscillating lever 14 to cause reciprocation of the abrasive carrying tray. The upper end of the tray in Figure 2 is provided with smaller slots 24 adapted to engage the lugs 12 to hold the tray stationary when the 'seinbled directly against the tray.

upper knife is being sharpened by reciprocation thereover, a wide recess '25 being provided to give clearance for the oscillating lever 14. To additionally secure the tray in position when sharpening the upper knife, lugs 26 are struck from the tray to engage the sides of the lower knife.

To sharpen the stationary knife the abrasive side of the tray is placed thereon with the slot 22 over the lugs 12. It is not necessary to rep-lace the upper knife unless so desired, as the clamp and knob can be as- The spring washer under the knob gives any de-' sired load on the abrasive while cutting, the movement of the tray being indicated by the dotted lines in Figure 6. To sharpen the upper knife the. abrasive carrying tray is held stationary on the lower knife and the upper knife reciprocated thereover, as indicated by the dotted lines in Figure 5-.

I am aware that many changes may be made, and numerous details of construction may be varied through a wide range Without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

The combination with a hair clipper having a stationary and a reciprocating knife, of a reversible abrasive member adapted to be inserted between the knives having means engaging the clipper mechanism when in serted in one position to reciprocate the abrasive member over the stationary knife, and having means -engaging the stationary knife when reversed to retain the same against movement.

In testimony whereof I have hereunto subscribed my name, v s

. JACOB I. NIESEN. 

